code: def _call_impl(self, t):
      x = (t - self.t_old) / self.h
  
      if t.ndim == 0:
          y = np.zeros_like(self.y_old)
      else:
          x = x[:, None]
          y = np.zeros(
              (len(x), len(self.y_old)), dtype=self.y_old.dtype
          )
  
      for i, f in enumerate(reversed(self.F)):
          y += f
          if i % 2 == 0:
              y *= x
          else:
              y *= 1 - x
      y += self.y_old
  
      return y.T
  
imports: import numpy
  from .base import OdeSolver, DenseOutput
  from .common import validate_max_step, validate_tol, select_initial_step, norm, warn_extraneous, validate_first_step
  from .None import dop853_coefficients
label_desc: Use image node_id 2 for calling the Dop853DenseOutput obj's underlying member method code with example usage: obj._call_impl(t) and returns: y